Definitions

01. Board. The Idaho Board of Environmental Quality. (3-24-22) 02. De minimis. A type of reuse permit issued to small-scale or low-risk recycled water reuse activities that are deemed to pose minimal risk to public health or the environment in the associated permit staff analysis. De minimis permits typically involve limited analysis, monitoring, and reporting obligations due to low-risk of activity. (7-1-25) 03. Department. The Idaho Department of Environmental Quality or its designee. (3-24-22) 04. Equivalent Dwelling Unit (EDU). A measure where one (1) EDU is equivalent to wastewater generated from one (1) single-family residence. For assessing fees associated with publicly or privately owned domestic sewage treatment, the number of EDUs is calculated as the population served divided by the average household size as defined in the most recent US Census Bureau data (for that municipality, county, or average number of persons per household for the state of Idaho). For fees associated with industrial wastewater treatment owned by a municipality, EDUs are calculated according to the definition of EDU in IDAPA 58.01.16, “Wastewater Rules.” (7-1-25) 05. Major Facility. (7-1-25) a. A publicly or privately owned treatment works with a design flow equal to or greater than one million gallons per day (1 MGD), or serves a population of ten thousand (10,000) or more, or causes significant water quality impacts; or (7-1-25) b. A non-municipal facility that equals or exceeds the eighty (80) point accumulation described in the Score Summary of the NPDES Non-municipal Permit Rating Work Sheet (June 27, 1990) or the Department equivalent. (7-1-25) 004. -- 099. (RESERVED)